package org.smart4j.chapter1.helper;

import org.smart4j.chapter1.util.ReflectionUtil;

import java.util.HashMap;
import java.util.Map;
import java.util.Set;

/**
 * @ClassName:
 * @Description:
 * @Author: LynnZou
 * @Date: 2017/5/27
 */
public final class BeanHelper  {

    private static final Map<Class<?>, Object> BEAN_MAP = new HashMap<Class<?>, Object>();

    static{
        Set<Class<?>> beanClassSet = ClassHelper.getBeanClassSet();
        for(Class<?> beanClass:beanClassSet){
            Object obj = ReflectionUtil.newInstance(beanClass);
            BEAN_MAP.put(beanClass,obj);
        }
    }

    /**
     * 获取Bean映射
     * @return
     */
    public static Map<Class<?>,Object> getBeanMap(){
        return BEAN_MAP;
    }


    /**
     * 获取Bean实例
     * @param cls
     * @param <T>
     * @return
     */
    public static<T> T getBean(Class<T> cls){
        if(!BEAN_MAP.containsKey(cls)){
            throw new RuntimeException("can not get bean by class: " + cls);
        }
        return (T)BEAN_MAP.get(cls);
    }


    /**
     * 设置Bean实例
     * @param cls
     * @param obj
     */
    public static void setBean(Class<?> cls,Object obj){
        BEAN_MAP.put(cls,obj);
    }

}
